Which of the following is true concerning a global transaction?

A The required data are at one local site and the distributed DBMS routes requests as necessary.

B The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.

C The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.

D The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS.

Correct Answer: The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.

Bissoy MCQ Team

#Database #Distributed Databases

Related Questions

(i) What is global warming? How global warming affects the rapid change of climate? (ii) What are the bad impacts of climate change? (iii) How climate change affects the environment of Bangladesh (iv) How global warming can be minimized (v) What should be the role of students to protect the environment.

A (i) Global warming is the main natural reason and using harmful chemicals in everyday life the main reason created by men. The climate is changing rapidly that result in the rise of the earth's average temperature

B (ii) Climate change impacts include floods, cyclones, storm surges and drought, ice sheets melting which will seriously affect the agriculture and livelihood especially at the poor.

C (iii) Bangladesh is one of the largest deltas in the world which is highly vulnerable to Natural Disasters because of its Geographical location, Fiat and low-lying landscape, Population density, Poverty, Illiteracy, Lack of Institutional setup, etc.

D (iv) To reduce the bad impact of climate change people should be aware of. Tree plantation can reduce global warming which is the main natural reason for climate change. Stop using harmful chemicals can reduce environmental pollution which is the main man

E (v) Students should be careful to protect the environment and raise awareness. Thus the students can play a vital role to reduce bad impact of climate changes.

Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?